N-acyl amino acid as corrosion protection

ABSTRACT

The present invention relates to a method of using N-acylamino acids or salts thereof to protect metal from corrosion, and to containers that at least in portions enclose a cavity, where the container comprises at least one metallic part and where a composition that encompasses at least one N-acylamino acid and water is arranged in the cavity.

FIELD OF THE INVENTION

The present invention generally relates to the use of N-acylamino acidsor salts thereof to protect metal from corrosion, and to products thatencompass a metal-containing container in which a compositionencompassing at least one N-acylamino acid (or salt thereof) and wateris contained.

BACKGROUND OF THE INVENTION

The spray or foam delivery form represents an important and essentialtype of application aid for a variety of product types, in particularfor products to be used in the home and in cosmetics. For example,cleaning foams, cleaning sprays, room scenting sprays, deodorant sprays,hair sprays, or hair foams are known. If the sprays or foams are to bedelivered out of an aerosol container that is under pressure, thecompositions to be sprayed or foamed are packaged predominantly inaerosol containers made of metal, for example of aluminum.

Aerosol containers made of metal can be effectively filled and sealedgas-tight in the production process. Directly after this productionprocess, these filled aerosol containers withstand the applied internalgas pressure to an outstanding degree. It is only after a certainstorage period that sealing problems often occur, usually caused bycorrosion of the metal parts. Continuous contact between a compositionthat is, for example, to be sprayed or foamed and metal components ofthe container is favorable to corrosion. Corrosion promotes, forexample, pitting on walls of an aerosol container, which often resultsin leakage of the aerosol container. Gas and product emerge at the leaksites, decreasing the functionality of the product as well as productsafety. In addition, corrosion can likewise impair the functionality ofthe valve. For the consumer product sector, several years sometimeslapse between manufacture of the product and use of the last productresidues. The customer must therefore be assured, inter alia, that theproduct (encompassing the application system and the composition to beapplied) is not subject to any modification due to corrosion, and willstill function correctly even after such a period.

There has been no lack of attempts in the past to solve this problem.One possibility for protecting metal from corrosion is offered by aninternal coating of the metal wall with a paint. For purposes of theinvention (see DIN EN 927-1: 1996-10) a “paint” is a liquid or pasty orpowdered (optionally pigmented) coating substance that, when appliedonto a substrate, results in a covering coating having protective,decorative, or other specific technical properties. Liquid paints (i.e.wet paints) are usually used to coat metal, in which context the paintsthemselves as well as the paint layer resulting therefrom containorganic solvents. For environmental reasons and for occupational safetyreasons, organic solvents should largely be avoided in paints. A “powderpaint” is understood for purposes of the invention (see DIN EN 971-1:1996-09) as powdered, solvent-free coating substances that yield acoating after melting and optionally, baking. Powder paints are likewisesuitable for coating aerosol containers. The coating achieved usingpowder paint exhibits increased pore formation, however, as a result ofair inclusions. These pores in turn offer a possibility for contactbetween the metal and the composition to be sprayed or foamed, andpromote corrosion.

In addition, microcracks in the internal coating of painted aerosolcontainers are produced to a certain extent by the crimping operationthat is usual for sealing the containers. Corrosion again preferentiallyforms at these microcracks in the internal coating.

It has now been found, surprisingly, that the corrosion of metal parts(in particular of storage or delivery receptacles filled with corrosiveliquids) can be considerably reduced or even prevented by the use of atleast one N-acylamino acid.

Furthermore, other desirable features and characteristics of the presentinvention will become apparent from the subsequent detailed descriptionof the invention and the appended claims, taken in conjunction with thisbackground of the invention.

BRIEF SUMMARY OF THE INVENTION

In an embodiment, a method of protecting metal from corrosion comprises:using at least one N-acylamino acid or salts thereof to protect themetal.

In an embodiment, a product comprises: a product encompassing acontainer that at least in portions surrounds a cavity, wherein thecontainer comprises at least one metallic part and wherein a compositionthat encompasses at least one N-acylamino acid and water is arranged inthe cavity.

DETAILED DESCRIPTION OF THE INVENTION

The following detailed description of the invention is merely exemplaryin nature and is not intended to limit the invention or the applicationand uses of the invention. Furthermore, there is no intention to bebound by any theory presented in the preceding background of theinvention or the following detailed description of the invention.

Aqueous compositions containing N-acylamino acid are known, for examplefrom the cosmetics sector in the context of hair care, from Hart, J.Roger; Levy, Edward F., Org. Chem. Div. W. R. Grace and Co., Nashua,N.H., USA, Soap, Cosmetics, Chemical Specialties (1977), 53(8), 31-34.

A first subject of the invention is the use of at least one N-acylaminoacid or salts thereof to protect metal from corrosion.

“Corrosion” is understood for purposes of the invention as the reactionof a metallic material with its surroundings, which produces ameasurable change in the material and can lead to an impairment of thefunction of a metallic component or of an entire system (see DIN50900-1: 1982-04, -2: 1984-01 and -3: 1985-09).

Amino acids are carboxylic acids having one or more amino groups.Depending on the molecular structure of the N-acylamino acids accordingto the present invention, an acyl residue binds to at least one of theamino groups of the amino acid that are present.

When reference is made hereinafter to an “N-acylamino acid,” the saltform thereof is likewise implied according to the present invention.

It is preferred if the acyl residue of the N-acylamino acid is asaturated or unsaturated, linear or branched (C₈ to C₃₀) acyl residue.It is preferred in turn if the (C₈ to C₃₀) acyl residue derives fromcapric acid, caprylic acid, lauric acid, stearic acid, oleic acid,palmitic acid, linoleic acid, linolenic acid, fatty acid mixtures ofcoconut oil, fatty acid mixtures of palm oil, fatty acid mixtures oftall oil, or fatty acid mixtures of rape oil.

The fatty acid mixtures recited above are the respective fatty acid cutof the glycerides of the correspondingly recited oil.

The N-acylamino acids usable according to the present invention arepreferably N-acylated alpha-amino acids. These N-acylated amino acidscan be selected from among N-acylated aliphatic amino acids (inparticular N-acylated glycine, N-acylated alanine, N-acylated valine,N-acylated leucine, N-acylated isoleucine), N-acylated aromatic aminoacids (in particular N-acylated phenylalanine, N-acylated tyrosine,N-acylated tryptophan), N-acylated acid amino acids (in particularN-acylglutamic acid, N-acylsarcosine, or N-acylaspartic acid), as wellas N-acylated basic amino acids (in particular N-acylated arginine,N-acylated lysine, N-acylated histidine). It is preferred in turn toselect the N-acylamino acids from at least one acid amino acid. In thecontext of the embodiments recited above, the aforementioned saturatedor unsaturated, linear or branched N—(C₈ to C₃₀) acyl residues are inturn respectively preferred, especially those explicitly recited (seeabove).

Particularly preferable N-acylamino acids are selected from at least onecompound of formula (I)

in whichR¹ signifies a linear or branched, saturated or unsaturated hydrocarbonresidue,R² denotes a hydrogen atom, a (C₁ to C₄) alkyl group, or a (C₂ to C₄)hydroxyalkyl group,

R³ denotes a hydrogen atom or a group, where n=1 or 2,M signifies, mutually independently, a hydrogen atom or an equivalent ofa monovalent or polyvalent cation.

Examples of (C₁ to C₄) alkyl groups according to the present inventionare methyl, ethyl, n-propyl, isopropyl, n-butyl, sec-butyl, isobutyl,tert-butyl.

Examples of (C₂ to C₄) hydroxyalkyl groups according to the presentinvention are 2-hydroxyethyl, 3-hydroxypropyl, 2-hydroxypropyl, and4-hydroxybutyl.

The residues R¹ of formula (I) preferably denote a (C₉ to C₂₃) alkylgroup, a (C₉ to C₂₃) alkenyl group having up to four unsaturated doublebonds, or a (C₉ to C₂₃) hydroxyalkyl group, particularly preferably,mutually independently, a residue selected from the list that isconstituted from nonyl, undecyl, tridecyl, pentadecyl, heptadecyl,nonadecyl, henicosanyl, 15-methylhexadecyl, heptadec-8-enyl,heptadeca-8,11-dienyl, nonadeca-4,7,10,13-tetraenyl, andheptadeca-8,11,14-trienyl.

The residue R² according to formula (I) preferably denotes a residueselected from the group constituted from a hydrogen atom, methyl, ethyl,isopropyl, n-propyl, and 2-hydroxyethyl. The aforesaid residue R²particularly preferably denotes a hydrogen atom or a methyl group.

For the case in which R³ denotes a hydrogen atom, R² preferably denotesa methyl group.

For the case in which R³ denotes a

group, R² preferably denotes a hydrogen atom.

If the compounds of formula (I) are present as an acid, the residue Mdenotes a hydrogen atom. If the compounds of formula (I) are present asa salt, M denotes an equivalent of a monovalent or polyvalent cation.The monovalent or polyvalent cation M^(z+) respectively having a valencyz of one or higher serves, merely for reasons of electroneutrality, tocompensate for the single negative charge of the carboxylate fragment—COO⁽⁻⁾ of formula (I) that is present in the context of salt formation.The equivalent of the corresponding cation that is to be used is equalto 1/z. In the case of salt formation, the fragment —COOM of formula (I)denotes the group:

—COO⁽⁻⁾1/z(M^(z+)).

All physiologically acceptable cations are suitable in principle asmonovalent or polyvalent cations M. These are, in particular, metalcations of the physiologically acceptable metals from groups Ia, Ib,IIa, IIb, Mb, VIa, or VIII of the periodic table of the elements,ammonium ions, as well as cationic organic compounds having aquaternized nitrogen atom. The latter are formed, for example, byprotonation of primary, secondary, or tertiary organic amines with anacid, for example with compounds of formula (I) in their acid form, orby permanent quaternization of the said organic amines. Examples ofthese cationic organic ammonium compounds are 2-ammonioethanol and2-trimethylammonioethanol. M resp. M′ in formula (I) preferably denotesa hydrogen atom, an ammonium ion, an alkali metal ion, a half-equivalentof an alkaline-earth metal ion, or a half-equivalent of a zinc ion,particularly preferably a hydrogen atom, an ammonium ion, a sodium ion,a potassium ion, 1/2-calcium ion, 1/2-magnesium ion, or 1/2-zinc ion.

The compounds of formula (I) are preferably selected from at least onecompound of the group that is constituted from N-lauroylsarcosine,N-myristoylsarcosine, N-palmitoylsarcosine, N-oleylsarcosine,N-cocoylsarcosine (a mixture of compounds being present in this case,and “cocoyl” corresponding to the composition of the fatty acid cut ofcoconut oil), N-palm kernel sarcosine (a mixture of compounds beingpresent in this case, and “palm kernel” corresponding to the compositionof the fatty acid cut of palm kernel oil), N-lauroyl glutamate,N-myristoyl glutamate, N-palmitoyl glutamate, N-oleyl glutamate,N-cocoyl glutamate (a mixture of compounds being present in this case,and “cocoyl” corresponding to the composition of the fatty acid cut ofcoconut oil), N-palm kernel glutamate (a mixture of compounds beingpresent in this case, and “palm kernel” corresponding to the compositionof the fatty acid cut of palm kernel oil), and from the salts (inparticular the sodium salts) of the compounds recited above.

The triglycerides of coconut oil exhibit the following fatty acidcomposition:

45 to 51% lauric acid 16 to 19% tetradecanoic acid  8 to 10% oleic acid 9 to 11% palmitic acid  6 to 9% decanoic acid  5 to 8% octanoic acid.

The triglycerides of palm kernel oil exhibit the following fatty acidcomposition:

47 to 52% lauric acid 16 to 19% tetradecanoic acid 10 to 18% oleic acid 6 to 9% palmitic acid  2 to 3% stearic acid  1 to 3% linoleic acid  2to 5% decanoic acid  1 to 3% octanoic acid.

The said N-acylamino acid is used in the context of a preferredembodiment to decrease corrosion due to liquid compositions. For thispurpose the N-acylamino acid can be applied as a coating onto the metal,or can be introduced into the liquid composition. In the context of aparticularly preferred embodiment of the invention the N-acylamino acidor salt thereof is preferably present dissolved in a medium that isliquid at a temperature from 10 to 40° C. at 1013 millibar (mbar). Theliquid medium is preferably a water-containing liquid medium, inparticular a water-containing electrolyte solution. An “electrolyte” isunderstood for purposes of the invention as a chemical compound that ispresent dissociated into ions in a solution of the correspondingwater-containing liquid medium. Said electrolytes are different from thesaid N-acylamino acids.

A second subject of the invention is a product encompassing a containerthat at least in portions surrounds a cavity, where the containercomprises at least one metallic part and where a composition thatencompasses at least one N-acylamino acid and water is arranged in thecavity.

N-Acylamino acids that are preferably usable are those of the firstsubject of the invention.

The composition contains the N-acylamino acid preferably in a quantityfrom 0.0001 to 5.0 wt %, particularly preferably from 0.005 to 2.0 wt %,very particularly preferably from 0.005 to 1.0 wt %, based in each caseon the weight of the composition.

The composition contains preferably at least 20 wt % water, particularlypreferably at least 40 wt %, based in each case on the weight of thecomposition.

The composition present in the cavity of the container is preferablyliquid at least at a temperature from 10 to 40° C. at 1013 mbar.

The composition present in the cavity of the container preferablycontains additional electrolytes besides the N-acylamino acid. These canbe organic and/or inorganic salts, for example sodium chloride, anionicsurfactants, cationic surfactants, or can be polyelectrolytes such as,for example, ionic film-forming and/or ionic setting polymers (inparticular corresponding cationic polymers, anionic polymers, oramphoteric polymers). The additional electrolytes are of coursedifferent from the N-acylamino acids.

The N-acylamino acids used according to the present invention decreaseto a particular extent, the corrosion potential of compositions thatencompass halogen-containing electrolytes, in particular selected fromchloride- and bromide-containing electrolytes.

“Film-forming polymers” are to be understood as those polymers that,upon drying, leave behind a continuous film on the skin, hair, or nails.Film-formers of this kind can be used in a very wide variety of cosmeticproducts such as, for example, face masks, make-up, hair setting agents,hair sprays, hair gels, hair waxes, hair therapies, shampoos, or nailpolishes. Those polymers that possess sufficient solubility in water,alcohol or in water/alcohol mixtures to be present in completelydissolved form in the agent according to the present invention areparticularly preferred. The film-forming polymers can be of synthetic ornatural origin.

“Film-forming polymers” are furthermore understood as those polymersthat, when applied in a 0.01- to 20-wt % aqueous, alcoholic, or aqueousalcoholic solution, are capable of depositing a transparent polymer filmon the hair.

Setting polymers contribute to the hold, and/or to buildup of the hairvolume and hair fullness, of the overall hairstyle. These polymers areat the same time also film-forming polymers and are therefore generallytypical substances for shape-imparting hair-treatment agents such ashair setting agents, hair foams, hair waxes, hair sprays. It iscertainly possible for film formation to be localized, and for only afew fibers to be connected to one another.

The corrosion protection according to the present invention is suitablein particular for those compositions that, besides water, additionallycontain at least one cationic surfactant and/or at least one cationicpolymer. A “polymer” is understood according to the present invention asa substance having an average molar mass (weight-average) greater than10,000 grams per mol (g/mol) that is constructed from at least onerepeating structural unit and is accessible by way of a natural orsynthetic polyreaction (i.e. reaction of a monomer or of a mixture ofdifferent monomers).

Cationic polymers comprise, for purposes of the invention, at least onestructural unit that contains at least one permanently cationizednitrogen atom. “Permanently” cationized nitrogen atoms are to beunderstood as those nitrogen atoms that carry a positive charge andthereby form a quaternary ammonium compound. Quaternary ammoniumcompounds are usually produced by the reaction of tertiary amines withalkylating agents such as, for example, methyl chloride, benzylchloride, dimethyl sulfate, dodecyl bromide, but also ethylene oxide.Depending on the tertiary amine used, the following groups are known inparticular: alkylammonium compounds, alkenylammonium compounds,imidazolinium compounds, and pyridinium compounds.

Compositions preferred for purposes of the invention contain thecationic polymers in a quantity from 0.1 wt % to 20.0 wt %, particularlypreferably from 0.2 wt % to 10.0 wt %, based in each case on the weightof the agent.

The cationic polymers are preferably selected from cationic quaternizedcellulose derivatives.

Those cationic quaternized celluloses that carry more than one permanentcationic charge in a side chain have proven in general to beadvantageous. To be emphasized thereamong are, among the cationiccellulose derivatives, those that are manufactured by the reaction ofhydroxyethyl cellulose with a dimethyldiallylammonium reactant (inparticular dimethyldiallylammonium chloride), optionally in the presenceof further reactants. Particularly suitable in turn among these cationiccelluloses are those cationic celluloses having the INCI namePolyquaternium-4, which are marketed e.g. under the names Celquat® H100, Celquat® L 200 by the National Starch company.

Also preferably suitable are those cationic polymers that encompass atleast one structural unit of formula (I) and at least one structuralunit of formula (2) and optionally at least one structural unit offormula (3)

in whichR¹ and R⁴ denote, mutually independently, a hydrogen atom or a methylgroup,A¹ and A² denote, mutually independently, an ethane-1,2-diyl,propane-1,3-diyl, or butane-1,4-diyl group,R², R³, R⁵, and R⁶ denote, mutually independently, a (C₁ to C₄) alkylgroup,R⁷ denotes a (C₈ to C₃₀) alkyl group.

All possible physiologically acceptable anions, for example chloride,bromide, hydrogen sulfate, methyl sulfate, ethyl sulfate,tetrafluoroborate, phosphate, hydrogen phosphate, dihydrogen phosphate,or p-toluenesulfonate, triflate, serve to compensate for the positivecharge of monomer (3).

It may be preferred if the cationic polymers additionally encompass,besides the structural units of formula (I) and of formula (2) and offormula (3), at least one structural unit of formula (4):

Suitable compounds are commercially obtainable, for example, as

-   -   copolymers of dimethylaminoethyl methacrylate, quaternized with        diethyl sulfate, with vinylpyrrolidone, having the INCI name        Polyquaternium-11, under the designations Gafquat® 440, Gafquat®        734, Gafquat® 755 (each ISP company) and Luviquat PQ 11 PN (BASF        SE),    -   copolymers of methacryloylaminopropyllauryldimethylammonium        chloride with N-vinylpyrrolidone and dimethylaminopropyl        methacrylamide, having the INCI name Polyquaternium-55, under        the commercial names Styleze® W-10, Styleze® W 20 (ISP company),    -   copolymers of methacryloylaminopropyllauryldimethylammonium        chloride with N-vinylpyrrolidone, N-vinylcaprolactam, and        dimethylaminopropyl methacrylamide, having the INCI name        Polyquaternium-69, under the commercial name Aquastyle® 300 (ISP        company).

Also included among cationic polymers preferably suitable for purposesof the invention are those cationic copolymers that contain at least onestructural element of formula (M1)

in whichR″ denotes a (C₁ to C₄) alkyl group, in particular a methyl group, andadditionally comprise at least one further cationic and/or nonionicstructural element.

All possible physiologically acceptable anions, for example chloride,bromide, hydrogen sulfate, methyl sulfate, ethyl sulfate,tetrafluoroborate, phosphate, hydrogen phosphate, dihydrogen phosphate,or p-toluenesulfonate, triflate, serve to compensate for the positivepolymer charge.

It is preferred according to the present invention if the agentaccording to the present invention contains as a cationic polymer atleast one copolymer that, besides at least one structural element offormula (M1), additionally encompasses at least one structural elementof formula (I)

in which

R″ denotes a (C₁ to C₄) alkyl group, in particular a methyl group.

All possible physiologically acceptable anions, for example chloride,bromide, hydrogen sulfate, methyl sulfate, ethyl sulfate,tetrafluoroborate, phosphate, hydrogen phosphate, dihydrogen phosphate,or p-toluenesulfonate, triflate, serve to compensate for the positivepolymer charge of the copolymers.

Particularly preferred cationic polymers contains 10 to 30 mole percent(mol %), by preference 15 to 25 mol %, and in particular 20 mol %structural units according to formula (M1) and 70 to 90 mol %, bypreference 75 to 85 mol %, and in particular 80 mol % structural unitsaccording to formula (I).

It is particularly preferred in this context if the copolymers contain,besides polymer units that result from incorporation of the aforesaidstructural units according to formula (M1) and (1) into the copolymer, amaximum of 5 wt %, by preference a maximum of 1 wt % polymer units thatare based on the incorporation of other monomers. By preference, thecopolymers are constructed exclusively, except for the terminus, fromstructural units of formula (M1) where R″=methyl, and (1), and can bedescribed by the general formula (Poly1)

where the indices m and p each vary depending on the molar mass of thepolymer and are not intended to signify that these are block copolymers.Structural units of formula (M1) and of formula (I) can instead bepresent in statistically distributed fashion in the molecule.

If a chloride ion is used to compensate for the positive charge of thepolymer of formula (Poly1), theseN-methylvinylimidazole/vinylpyrrolidone copolymers are then referred toaccording to INCI nomenclature as Polyquaternium-16 and are obtainablee.g. from BASF under the commercial names Luviquat® Style, Luviquat® FC370, Luviquat® FC 550, Luviquat® FC 905, and Luviquat® HM 552.

If a methosulfate is used to compensate for the positive charge of thepolymer of formula (Poly1), theseN-methylvinylimidazole/vinylpyrrolidone copolymers are then referred toaccording to INCI nomenclature as Polyquaternium-44 and are obtainablee.g. from BASF under the commercial names Luviquat® UltraCare.

Particularly preferred agents according to the present invention containa copolymer, in particular of formula (Poly1), that has molar masseswithin a specific range. Agents according to the present invention inwhich the copolymer has a molar mass from 50 to 400 kilo Daltons (kDa),by preference from 100 to 300 kDa, more preferably from 150 to 250 kDa,and in particular from 190 to 210 kDa, are preferred here.

In addition to or instead of the copolymer or copolymers, thecompositions according to the present invention can also containcopolymers that, besides structural units of formulas (M1-a) and (1),contain as additional structural units those of formula (4)

Further particularly preferred agents according to the present inventionare thus characterized in that they contain as a cationic polymer atleast one copolymer that contains at least one structural unit inaccordance with formula (M1-a) and at least one structural unit inaccordance with formula (I) and at least one further structural unit inaccordance with formula (4)

Here as well, it is particularly preferred if the copolymers contain,besides polymer units that result from the incorporation of theaforesaid structural units according to formulas (M1-a), (1), and (4)into the copolymer, a maximum of 5 wt %, by preference a maximum of 1 wt%, polymer units that are based on the incorporation of other monomers.The copolymers are by preference constructed exclusively, except for theterminus, from structural units of formulas (M1-a), (1), and (4), andcan be described by the general formula (Poly2)

where the indices m, n and p each vary depending on the molar mass ofthe polymer and are not intended to signify that these are blockcopolymers. Structural units of the aforesaid formulas can instead bepresent in statistically distributed fashion in the molecule.

All possible physiologically acceptable anions, for example chloride,bromide, hydrogen sulfate, methyl sulfate, ethyl sulfate,tetrafluoroborate, phosphate, hydrogen phosphate, dihydrogen phosphate,or p-toluenesulfonate, triflate, serve to compensate for the positivepolymer charge of the component.

If a methosulfate is used to compensate for the positive charge of thepolymer of formula (Poly2), theseN-methylvinylimidazole/vinylpyrrolidone/vinylcaprolactam copolymers arethen referred to according to INCI nomenclature as Polyquaternium-46 andare obtainable e.g. from BASF under the commercial name Luviquat® Hold.

Very particularly preferred copolymers contain 1 to 20 mol %, bypreference 5 to 15 mol %, and in particular 10 mol % structural unitsaccording to formula (M-1a), and 30 to 50 mol %, by preference 35 to 45mol %, and in particular 40 mol % structural units according to formula(I), and 40 to 60 mol %, by preference 45 to 55 mol %, and in particular60 mol % structural units according to formula (4).

Particularly preferred agents according to the present invention containa copolymer that has molar masses within a specific range. Agentsaccording to the present invention in which the copolymer has a molarmass from 100 to 1000 kDa, by preference from 250 to 900 kDa, morepreferably from 500 to 850 kDa, and in particular from 650 to 710 kDa,are preferred here.

The compositions according to the present invention can also contain, asa cationic polymer, copolymers that comprise as structural unitsstructural units of formulas (M1-a) and (1), as well as furtherstructural units from the group of the vinylimidazole units and furtherstructural units from the group of the acrylamide and/or methacrylamideunits.

Further particularly preferred agents according to the present inventionare characterized in that they contain, as a cationic polymer, at leastone copolymer that contains at least one structural unit according toformula (M−1a) and at least one further structural unit according toformula (I) and at least one further structural unit according toformula (5) and at least one further structural unit according toformula (6)

Here as well, it is particularly preferred if the copolymers contain,besides polymer units that result from incorporation of the aforesaidstructural units according to formulas (M1-a), (1), (5), and (6) intothe copolymer, a maximum of 5 wt %, by preference a maximum of 1 wt %,polymer units that are based on the incorporation of other monomers. Thecopolymers are by preference constructed exclusively, except for theterminus, from structural units of formulas (M1-a), (1), (5), and (6)and can be described by the general formula (Poly3)

where the indices m, n, o and p each vary depending on the molar mass ofthe polymer and are not intended to signify that these are blockcopolymers. Structural units of formulas (M1-a), (1), (5), and (6) caninstead be present in statistically distributed fashion in the molecule.

All possible physiologically acceptable anions, for example chloride,bromide, hydrogen sulfate, methyl sulfate, ethyl sulfate,tetrafluoroborate, phosphate, hydrogen phosphate, dihydrogen phosphate,or p-toluenesulfonate, triflate, serve to compensate for the positivepolymer charge of the component.

If a methosulfate is used to compensate for the positive charge of thepolymer of formula (Poly3), theseN-methylvinylimidazole/vinylpyrrolidone/vinylimidazole/methacrylamidecopolymers are referred to according to INCI nomenclature asPolyquaternium-68 and are obtainable e.g. from BASF under the commercialname Luviquat® Supreme.

Very particularly preferred copolymers contain 1 to 12 mol %, bypreference 3 to 9 mol %, and in particular 6 mol % structural unitsaccording to formula (M-1a), and 45 to 65 mol %, by preference 50 to 60mol %, and in particular 55 mol % structural units according to formula(I), and 1 to 20 mol %, by preference 5 to 15 mol %, and in particular10 mol % structural units according to formula (5), and 20 to 40 mol %,by preference 25 to 35 mol %, and in particular 29 mol % structuralunits according to formula (6).

Particularly preferred agents according to the present invention containa copolymer that has molar masses within a specific range. Agentsaccording to the present invention in which the copolymer has a molarmass from 100 to 500 kDa, by preference from 150 to 400 kDa, morepreferably from 250 to 350 kDa, and in particular from 290 to 310 kDa,are preferred here.

Among the additional cationic polymers having at least one structuralelement of the above formula (M1), those considered preferred are:

-   -   vinylpyrrolidone/1-vinyl-3-methyl-1H-imidazolium chloride        copolymers (such as, for example, the one having the INCI name        Polyquaternium-16, under the commercial designations Luviquat®        Style, Luviquat® FC 370, Luviquat® FC 550, Luviquat® FC 905, and        Luviquat® HM 552 (BASF SE)),    -   vinylpyrrolidone/1-vinyl-3-methyl-1H-imidazolium methyl sulfate        copolymers (such as, for example, the one having the INCI name        Polyquaternium-44, under the commercial designations Luviquat®        Care (BASF SE)),    -   vinylpyrrolidone/vinylcaprolactam/1-vinyl-3-methyl-1H-imidazolium        terpolymers (such as, for example, the one having the INCI name        Polyquaternium-46, under the commercial designations Luviquat®        Care or Luviquat® Hold (BASF SE)),    -   vinylpyrrolidone/methacrylamide/vinylimidazole/1-vinyl-3-methyl-1H-imidazolium        methyl sulfate copolymers (such as, for example, the one having        the INCI name Polyquaternium-68, under the commercial        designations Luviquat® Supreme (BASF SE)),        as well as mixtures of said polymers.

All usual cationic surfactants known to one skilled in the art can beused according to the present invention as cationic surfactants.Cationic surfactants that are preferably suitable are permanentlycationic. Particularly preferred cationic surfactants are selected fromamong:

-   -   quaternary imidazoline compounds. The formula Quimi-I depicted        below shows the structure of these compounds.

The residues R denote, mutually independently in each case, a saturatedor unsaturated, linear or branched hydrocarbon residue having a changelength from 8 to 30 carbon atoms. The preferred compounds of formula Icontain the same hydrocarbon residue for each residue R. The chainlength of the residues R is preferably 12 to 21 carbon atoms. Examplesthat are particularly in accordance with the present invention areobtainable, for example, under the INCI names Quaternium-27,Quaternium-72, Quaternium-83, and Quaternium-91.

-   -   cationic surfactants in accordance with formula (Tkat-2),

RCO—X—N⁺R¹R²R³A⁻  (Tkat-2).

R therein denotes a substituted or unsubstituted, branched orstraight-chain alkyl or alkenyl residue having 11 to 35 carbon atoms inthe chain,X denotes —O— or —NR⁵—,R¹ denotes an alkylene group, having 2 to 6 carbon atoms, which can besubstituted or unsubstituted; in the event of a substitution,substitution with an —OH or —NH group is preferred,R², R³ each denote, mutually independently, an alkyl or hydroxyalkylgroup having 1 to 6 carbon atoms in the chain, such that the chain canbe straight or branched.R⁵ denotes hydrogen or a C₁ to C₆ straight-chain or branched alkyl oralkenyl residue, which can also be substituted with a hydroxy group.

Within this structure class, the compounds having one of the followingstructures are used in preferred fashion:

CH₃(CH₂)₂₀CONH(CH₂)₃—N⁺(CH₃)₂—CH₂CH₃A⁻  (Tkat-3)

CH₃(CH₂)₂₀CONH(CH₂)₃—N⁺(CH₃)₂—CH₂(CHOH)CH₂OHA⁻  (Tkat-4)

CH₃(CH₂)₂₀COOCH₂CHOHCH₂—N⁺(CH₃)₃A⁻  (Tkat-5)

CH₃(CH₂)₂₀CONH(CH₂)₃—N⁺(CH₃)₂—CH₂CH₂OHA⁻  (Tkat-6).

Examples of commercial products of this kind are Schercoquat BAS,Lexiquat AMG-BEO, Akypoquat 131, or Incroquat Behenyl HE.

-   -   Esterquats in accordance with formula (Tkat1-2) can be used:

The residues R1, R2, and R3 therein are each mutually independent andcan be the same or different. Residues R1, R2, and R3 denote:

-   -   a branched or unbranched alkyl residue having 1 to 4 carbon        atoms, which can contain at least one hydroxyl group, or    -   a saturated or unsaturated, branched or unbranched, or cyclic        unsaturated or unsaturated alkyl residue having 6 to 30 carbon        atoms, which can contain at least one hydroxyl group, or    -   an aryl or alkaryl residue, for example phenyl or benzyl,    -   the residue (-A-R4), provided that at most two of the residues        R1, R2, or R3 can denote this residue:        The residue -(A-R4) is contained at least 1 to 3 times.        In this, A denotes:    -   1) —(CH₂)n-, where n=1 to 20, by preference n=1 to 10, and        particularly preferably n=1 to 5, or    -   2) —(CH₂—CHR⁵—O)n-, where n=1 to 200, by preference 1 to 100,        particularly preferably 1 to 50, and particularly preferably 1        to 20, where R5 has the meaning of hydrogen, methyl, or ethyl,        and    -   R4 denotes:    -   1) R6-O—CO—, in which R6 is a saturated or unsaturated, branched        or unbranched, or cyclic saturated or unsaturated alkyl residue        having 6 to 30 carbon atoms, which can contain at least one        hydroxy group, and which optionally can be further oxyethylated        with 1 to 100 ethylene oxide units and/or 1 to 100 propylene        oxide units, or    -   2) R7-CO—, in which R7 is a saturated or unsaturated, branched        or unbranched, or cyclic saturated or unsaturated alkyl residue        having 6 to 30 carbon atoms, which can contain at least one        hydroxy group, and which optionally can be further oxyethylated        with 1 to 100 ethylene oxide units and/or 1 to 100 propylene        oxide units, and        -   Q denotes a physiologically acceptable organic or inorganic            anion.        -   Such products are marketed, for example, under the            trademarks Rewoquat®, Stepantex®, Dehyquart®, and Armocare®.            Examples of such esterquats are the products Armocare®            VGH-70 —an N,N-bis(2-palmitoyloxyethyl)dimethylammonium            chloride—as well as Dehyquart® F-75, Dehyquart® C.-4046,            Dehyquart® L-80, Dehyquart® F-30, Dehyquart® AU-35,            Rewoquat® WE18, Rewoquat® WE38 DPG, and Stepantex® VS 90.            Further compounds of formula (Tkat1-2) that are particularly            preferred according to the present invention belong to            formula (Tkat1-2.1), the cationic betaine esters:

The meaning of R8 corresponds to that of R7.

-   -   Monoalkyltrimethylammonium salts having an alkyl residue chain        length from 12 to 24 carbon atoms, corresponding to formula        (Tkat1-1)

in whichR1, R2, and R3 each denote a methyl group and R4 denotes a saturated,branched, or unbranched alkyl residue having a chain length from 12 to24 carbon atoms and A⁻ signifies an anion.

Examples of compounds of formula (Tkat1-1) are cetyltrimethylammoniumchloride, cetyltrimethylammonium bromide, cetyltrimethylammoniummethosulfate, stearyltrimethylammonium chloride,behenyltrimethylammonium chloride, behenyltrimethylammonium bromide, andbenehyltrimethylammonium methosulfate.

quaternized amidoamines having the following structural formula:

R¹—N—(CH₂)_(n)—N⁺R²R³R⁴  (Tkat7)

in which,R¹ denotes an acyl or alkyl residue having 6 to 30 carbon atoms, whichcan be branched or unbranched, saturated or unsaturated, and such thatthe acyl residue and/or alkyl residue can contain at least one OH group,andR², R³, and R⁴ each denote, mutually independently, hydrogen or an alkylresidue having 1 to 4 carbon atoms, which can be the same or different,saturated or unsaturatedX⁻ signifies an anion, andn signifies a whole number between 1 and 10.Amidoamines that are quaternized and are suitable for use according tothe present invention are Rewoquat® RTM 50 (Witco Surfactants GmbH, INCIname: Ricinoleamidopropyltrimonium Methosulfate), Empigen® CSC (Albright& Wilson, INCI name: Cocamidopropyltrimonium Chloride), Swanol® LanoquatDES-50 (Nikko, INCI name: Quaternium-33), Rewoquat® UTM 50 (WitcoSurfactants GmbH, Undecyleneamidopropyltrimonium Methosulfate).

cationic surfactants of formula (Tkat-8)

in whichx and y mutually independently denote a whole number greater than 0,R denotes a (C₈ to C₂₀) alkyl group or a (C₈ to C₂₀) alkenyl group,R¹ denotes a *—(CH₂CH₂O)_(z)H group in which z signifies a whole numbergreater than 0, a (C₈ to C₂₀) alkyl group, or a (C₈ to C₂₀) alkenylgroup,X⁻ denotes an anion. It is preferred according to the present inventionif R′ according to formula (Tkat-8) denotes a *-(CH₂CH₂O)_(z)H group inwhich z signifies a whole number greater than 0. A preferred cationicsurfactant of formula (Tkat-8) is the tris(oligooxyethyl)alkylammoniumdihydrogen phosphate salt, having a molecular weight of 780 g/mol, thathas the INCI name Quaternium-52 and is marketed, for example, under thecommercial name Dehyquart® SP by the Cognis company.

The anion of all the cationic compounds described above is selected fromthe physiologically acceptable anions. Examples thereof that may berecited are, for example, the halide ions, fluoride, chloride, bromide,sulfate of the general formula RSO₃ ⁻ in which R has the meaning of asaturated or unsaturated alkyl residues having 1 to 4 carbon atoms, oranionic residues of organic acids such as maleate, fumarate, oxalate,tartrate, citrate, lactate, or acetate.

It is very particularly preferred if the composition according to thepresent invention contains at least one mono alkyltrimethylammonium saltof formula (Tkat1-1)

in which R1, R2, and R3 each denote a methyl group and R4 denotes asaturated, branched or unbranched alkyl residue having a chain lengthfrom 12 to 24 carbon atoms, and A⁻ signifies an anion, in particularchloride or bromide.

Very particularly preferred compounds of formula (Tkat1-1) are selectedfrom among cetyltrimethylammonium chloride, cetyltrimethylammoniumbromide, cetyltrimethylammonium methosulfate, stearyltrimethylammoniumchloride, behenyltrimethylammonium chloride, behenyltrimethylammoniumbromide, benehyltrimethylammonium methosulfate.

The cationic surfactants recited above can be used individually or inany combination with one another.

The utilization quantities of the cationic surfactants are preferablybetween 0.01 and 20 wt %; quantities from 0.01 to 10 wt % areparticularly preferably contained, and quantities from 0.1 to 7.5 wt %are very particularly preferably contained. The best results of all areobtained with quantities from 0.1 to 5 wt %. All quantities are basedrespectively on the weight of the total composition.

The compositions can additionally contain at least one monoalcoholhaving 1 to 4 carbon atoms, such as e.g. ethanol, isopropanol.

It is thus possible to use at least one (C₁ to C₄) monoalkyl alcohol inthe agents according to the present invention, in particular in aquantity from 1 to 50 wt %, in particular from 5 to 30 wt %. This can inturn be preferred in particular for packaging as an aerosol foam.

At least one organic solvent having a boiling point below 400° C., or atleast one mixture of the said solvents, can be contained as additionalco-solvents (once again preferably in a quantity from 0.1 to 15 weightpercent, particularly preferably from 1 to 10 weight percent based onthe total composition).

Particularly preferred water-soluble solvents are glycerol, ethyleneglycol, polyethylene glycol, propylene glycol, polypropylene glycol(once again preferably in a quantity of up to 15 wt % based on the totalcomposition).

The addition in particular of glycerol and/or propylene glycol and/orpolyethylene glycol and/or polypropylene glycol additionally increasesthe flexibility of the polymer film formed when the compositionaccording to the present invention is used. If a particularly flexiblehold is desired, the compositions according to the present inventiontherefore contain by preference 0.01 to 15 wt % glycerol and/orpropylene glycol and/or polyethylene glycol and/or polypropylene glycol,based on the total composition.

The compositions preferably have a pH from 2 to 11. Particularlypreferably, the pH range is between 2 and 7, very particularlypreferably between 4 and 6. The indications as to pH refer here, forpurposes of this document, to the pH at 25° C. unless otherwise noted.

The compositions according to the present invention can furthermorecontain the adjuvants and additives that are usually added toconventional styling agents.

Additional care-providing substances may be recited in particular assuitable adjuvants and additives.

A silicone oil and/or a silicone gum can be used, for example, as acare-providing substance.

Silicone oils or silicone gums that are suitable according to thepresent invention are, in particular, dialkyl- and alkylarylsiloxanes,for example dimethylpolysiloxane and methylphenylsiloxane, as well asalkoxylated, quaternized, or also anionic derivatives thereof. Cyclicand linear polydialkylsiloxanes, alkoxylated and/or aminated derivativesthereof, dihydroxypolydimethylsiloxanes, and polyphenylalkylsiloxanesare preferred.

Silicone oils produce a very wide variety of effects. For example, theysimultaneously influence dry and wet combability, the feel of dry andwet hair, and shine. One skilled in the art understands the term“silicone oils” to mean several structures of organosilicon compounds.They are understood firstly as the dimethiconols.

The following commercial products are recited as examples of suchproducts: Botanisil NU-150M (Botanigenics), Dow Corning 1-1254 Fluid,Dow Corning 2-9023 Fluid, Dow Corning 2-9026 Fluid, UltrapureDimethiconol (Ultra Chemical), Unisil SF-R (Universal Preserve),X-21-5619 (Shin-Etsu Chemical Co.), Abil OSW 5 (Degussa CareSpecialties), ACC DL-9430 Emulsion (Taylor Chemical Company), AECDimethiconol & Sodium Dodecylbenzenesulfonate (A & E Connock (Perfumery& Cosmetics) Ltd.), B C Dimethiconol Emulsion 95 (Basildon ChemicalCompany, Ltd.), Cosmetic Fluid 1401, Cosmetic Fluid 1403, Cosmetic Fluid1501, Cosmetic Fluid 1401DC (all the aforesaid Chemsil Silicones, Inc.),Dow Corning 1401 Fluid, Dow Corning 1403 Fluid, Dow Corning 1501 Fluid,Dow Corning 1784 HVF Emulsion, Dow Corning 9546 Silicone Elastomer Blend(all the aforesaid Dow Corning Corporation), Dub Gel S11400 (StearinerieDubois FiIs), HVM 4852 Emulsion (Crompton Corporation), Jeesile 6056(Jeen International Corporation), Lubrasil, Lubrasil DS (both GuardianLaboratories), Nonychosine E, Nonychosine V (both Exsymol), SanSurfPetrolatum-25, Satin Finish (both Collaborative Laboratories, Inc.),Silatex-D30 (Cosmetic Ingredient Resources), Silsoft 148, Silsoft E-50,Silsoft E-623 (all the aforesaid Crompton Corporation), SM555, SM2725,SM2765, SM2785 (all the aforesaid GE Silicones), Taylor T-SiI CD-1,Taylor TME-4050E (all Taylor Chemical Company), TH V 148 (CromptonCorporation), Tixogel CYD-1429 (Sud-Chemie Performance Additives),Wacker-Belsil CM 1000, Wacker-Belsil CM 3092, Wacker-Belsil CM 5040,Wacker-Belsil DM 3096, Wacker-Belsil DM 3112 VP, Wacker-Belsil DM 8005VP, Wacker-Belsil DM 60081 VP (all the aforesaid Wacker-Chemie GmbH).

Dimethicones constitute the second group of silicones that can becontained according to the present invention. They can be both linearand branched, and also cyclic or cyclic and branched.

Dimethicone copolyols constitute a further group of silicones that aresuitable. Corresponding dimethicone copolyols are commerciallyobtainable and are marketed, for example, by the Dow Corning companyunder the designation Dow Corning® 5330 Fluid.

The teaching of the present invention also, of course, encompasses thefact that the dimethiconols, dimethicones, and/or dimethicone copolymerscan already be present as an emulsion. The corresponding emulsion of thedimethiconols, dimethicones, and/or dimethicone copolyols can bemanufactured both after manufacture of the corresponding dimethiconols,dimethicones, and/or dimethicone copolyols, from them and using usualemulsification methods known to one skilled in the art. For this purposeboth cationic, anionic, nonionic, or zwitterionic surfactants andemulsifiers can be used, as auxiliaries, as adjuvants for manufacture ofthe corresponding emulsions. The emulsions of the dimethiconols,dimethicones, and/or dimethicone copolyols can of course also bemanufactured directly by way of an emulsion polymerization method. Suchmethods, too, are very familiar to one skilled in the art.

If the dimethiconols, dimethicones, and/or dimethicone copolyols areused as an emulsion, the droplet size of the emulsified particles isthen, according to the present invention, equal to 0.01 to 10,000 μm,preferably 0.01 to 100 μm, particularly preferably 0.01 to 20 μm, andvery particularly preferably 0.01 to 10 μm. The particle size isdetermined using the light-scattering method.

If branched dimethiconols, dimethicones, and/or dimethicone copolyolsare used, this is to be understood to mean that the branching is greaterthan a random branching that occurs randomly as a result of impuritiesin the respective monomers. “Branched” dimethiconols, dimethicones,and/or dimethicone copolyols are therefore to be understood, forpurposes of the present invention, to mean that the degree of branchingis greater than 0.01%. A degree of branching greater than 0.1% ispreferred, and very particularly preferably it is greater than 0.5%. Thedegree of branching is determined from the ratio of unbranched monomersto the branching monomers, i.e. to the quantity of tri- andtetrafunctional siloxanes. Both low-branching and high-branchingdimethiconols, dimethicones, and/or dimethicone copolyols can be veryparticularly preferred according to the present invention.

Particularly preferred silicones are aminofunctional silicones, inparticular the silicones grouped under the INCI name Amodimethicone. Itis therefore preferred according to the present invention if the agentsaccording to the present invention additionally contain at least oneaminofunctional silicone. These are to be understood as silicones thatcomprise at least one optionally substituted amino group. Thesesilicones are referred to according to the INCI declaration asAmodimethicone, and are obtainable, for example, in the form of anemulsion as a commercial product Dow Corning® 939, or as a commercialproduct Dow Corning® 949, mixed with a cationic and a nonionicsurfactant.

Those aminofunctional silicones that have an amine number above 0.25meq/g, by preference above 0.3 meq/g, and particularly preferably above0.4 meq/g are used by preference. The amine number here denotes themilliequivalent of amine per gram of the aminofunctional silicone; itcan be ascertained by titration, and can also be indicated with the “mgKOH/g” unit.

The compositions contain the silicones preferably in quantities from0.01 wt % to 15 wt %, particularly preferably from 0.05 to 2 wt %, basedon the total composition.

The agent can contain as a care-providing substance of a differentcompound class, for example, at least one protein hydrolysate and/or oneof its derivatives.

Protein hydrolysates are product mixtures obtained by the acid-, base-,or enzyme-catalyzed breakdown of proteins. The term “proteinhydrolyzates” is also understood according to the present invention tomean total hydrolysates as well as individual amino acids andderivatives thereof, as well as mixtures of different amino acids. Themolecular weight of the protein hydrolysates usable according to thepresent invention is between 75 (the molecular weight of glycine) and200,000; the molecular weight is equal to preferably 75 to 50,000dalton, and very particularly preferably to 75 to 20,000 dalton.

According to the present invention, protein hydrolysates of bothvegetable and animal origin, or of marine or synthetic origin, can beused.

The protein hydrolysates are contained in the agents according to thepresent invention, for example, in concentrations from 0.01 wt % to 20wt %, by preference from 0.05 wt % to 15 wt %, and very particularlypreferably in quantities from 0.05 wt % to 5 wt %, based in each case onthe total application preparation.

The composition according to the present invention can further containat least one vitamin, provitamin, vitamin precursor, and/or one of theirderivatives as a care-providing substance.

Those vitamins, provitamins, and vitamin precursors that are usuallyassigned to groups A, B, C, E, F, and H are preferred according to thepresent invention.

The compositions according to the present invention preferably containvitamins, provitamins, and vitamin precursors from groups A, B, C, E andH. Panthenol, pantolactone, pyridoxine and derivatives thereof, as wellas nicotinic acid amide and biotin, are particularly preferred.

D-panthenol is very particularly preferably used as a care-providingsubstance, optionally in combination with at least one of the siliconederivatives recited above.

The addition of panthenol increases the flexibility of the polymer filmformed upon application of the composition. If a particularly flexiblehold is desired, the agents according to the present invention can thuscontain panthenol. In a preferred embodiment the compositions containpanthenol, by preference in a quantity from 0.05 to 10 wt %,particularly preferably 0.1 to 5 wt %, based in each case on the totalcomposition.

The compositions can further contain at least one plant extract as acare-providing substance.

These extracts are usually produced by extraction of the entire plant.In individual cases, however, it may also be preferred to produce theextracts exclusively from blossoms and/or from leaves of the plant.

According to the present invention the extracts from green tea, oakbark, nettle, hamamelis, hops, henna, chamomile, burdock root,horsetail, hawthorn, linden blossoms, almond, aloe vera, pine needles,horse chestnut, sandalwood, juniper, coconut, mango, apricot, lemon,wheat, kiwi fruit, melon, orange, grapefruit, salvia, rosemary, birch,mallow, lady's-smock, wild thyme, yarrow, thyme, lemon balm, restharrow,coltsfoot, hibiscus, meristem, ginseng, and ginger root are especiallypreferred.

It may furthermore be preferred to use mixtures of several, inparticular from two, different plant extracts in the agents according tothe present invention.

Mono- or oligosaccharides can also be used as a care-providing substancein the agents according to the present invention.

Both monosaccharides and oligosaccharides, for example raw sugar, milksugar, and raffinose, can be used. The use of monosaccharides ispreferred according to the present invention. Among the monosaccharides,those compounds that contain 5 or 6 carbon atoms are in turn preferred.

Suitable pentoses and hexoses are, for example, ribose, arabinose,xylose, lyxose, allose, altrose, glucose, mannose, gulose, idose,galactose, talose, fucose and fructose. Arabinose, glucose, galactoseand fructose are carbohydrates that are preferably used; it is veryparticularly preferred to use glucose, which is suitable both in theD-(+) or L-(−) configuration or as a racemate.

The mono- or oligosaccharides are contained in the agents according tothe present invention preferably in a quantity from 0.1 to 8 wt %,particularly preferably 1 to 5 wt %, based on the total applicationpreparation.

The agent can furthermore contain at least one lipid as a care-providingsubstance.

Lipids suitable according to the present invention are phospholipids,for example soy lecithin, egg lecithin, and kephalins, as well as thesubstances known by the INCI names Linoleamidopropyl PG-DimoniumChloride Phosphate, Cocamidopropyl PG-Dimonium Chloride Phosphate, andStearamidopropyl PG-Dimonium Chloride Phosphate. These are marketed, forexample, by the Mona company under the commercial designationsPhospholipid EFA®, Phospholipid PTC®, and Phospholipid SV®. Thecompositions contain the lipids preferably in quantities from 0.01 to 10wt %, in particular 0.1 to 5 wt %, based on the total applicationpreparation.

Oily substances are furthermore suitable as a care-providing substance.

Included among the natural and synthetic cosmetic oily substances are,for example:

-   -   Vegetable oils. Examples of such oils are sunflower oil, olive        oil, soybean oil, rapeseed oil, almond oil, jojoba oil, orange        oil, wheat germ oil, peach-kernel oil, and the liquid components        of coconut oil. Also suitable, however, are other triglyceride        oils such as the liquid components of beef tallow, as well as        synthetic triglyceride oils.    -   Liquid paraffin oils, isoparaffin oils, and synthetic        hydrocarbons, as well as di-n-alkyl ethers having a total of        between 12 and 36 carbon atoms, in particular 12 to 24 carbon        atoms, for example di-n-octyl ether, di-n-decyl ether,        di-n-nonyl ether, di-n-undecyl ether, di-n-dodecyl ether,        n-hexyl-n-octyl ether, n-octyl-n-decyl ether, n-decyl-n-undecyl        ether, n-undecyl-n-dodecyl ether, and n-hexyl-n-undecyl ether,        as well as di-tert-butyl ether, diisopentyl ether,        di-3-ethyldecyl ether, tert-butyl-n-octyl ether,        isopentyl-n-octyl ether, and 2-methylpentyl-n-octyl ether. The        compounds 1,3-di-(2-ethylhexyl)cyclohexane (Cetiol® S) and        di-n-octyl ether (Cetiol® OE), available as commercial products,        may be preferred.    -   Ester oils. “Ester oils” are to be understood as the esters of        C₆ to C₃₀ fatty acids with C₂ to C₃₀ fatty alcohols. The        monoesters of the fatty acids with alcohols having 2 to 24        carbon atoms are preferred. Particularly preferred according to        the present invention are isopropyl myristate (Rilanit® IPM),        isononanoic acid C16-18 alkyl ester (Cetiol® SN), 2-ethylhexyl        palmitate (Cegesoft® 24), stearic acid 2-ethylhexyl ester        (Cetiol® 868), cetyl oleate, glycerol tricaprylate, coconut        fatty alcohol caprinate/caprylate (Cetiol® LC), n-butyl        stearate, oleyl erucate (Cetiol® J 600), isopropyl palmitate        (Rilanit® IPP), oleyl oleate (Cetiol®), lauric acid hexyl ester        (Cetiol® A), di-n-butyl adipate (Cetiol® B), myristyl myristate        (Cetiol® MM), cetearyl isononanoate (Cetiol® SN), oleic acid        decyl ester (Cetiol® V).    -   Dicarboxylic acid esters such as di-n-butyl adipate,        di-(2-ethylhexyl) adipate, di-(2-ethylhexyl) succinate, and        diisotridecyl acelaate, as well as diol esters such as ethylene        glycol dioleate, ethylene glycol diisotridecanoate, propylene        glycol di-(2-ethylhexanoate), propylene glycol diisostearate,        propylene glycol dipelargonate, butanediol diisostearate,        neopentyl glycol dicaprylate.    -   Symmetrical, asymmetrical, or cyclic esters of carbonic acid        with fatty alcohols, described for example in German application        197 56 454, glycerol carbonate, or dicaprylyl carbonate (Cetiol®        CC).    -   Fatty acid triesters of saturated and/or unsaturated linear        and/or branched fatty acids with glycerol.    -   Fatty acid partial glycerides, which are to be understood as        monoglycerides, diglycerides, and industrial mixtures thereof.        When industrial products are used, small quantities of        triglycerides may still be present for manufacturing-related        reasons. The partial glycerides preferably conform to formula        (D4-I):

in which R¹, R² and R³, mutually independently, denote hydrogen or alinear or branched, saturated and/or unsaturated acyl residue having 6to 22, by preference 12 to 18, carbon atoms, with the provision that atleast one of these groups denotes an acyl residue and at least one ofthese groups denotes hydrogen. The sum (m+n+q) denotes 0 or numbers from1 to 100, preferably 0 or 5 to 25. Preferably R¹ denotes an acyl residueand R² and R³ denote hydrogen, and the sum (m+n+q) is 0. Typicalexamples are mono- and/or diglycerides based on hexanoic acid, octanoicacid, 2-ethylhexanoic acid, decanoic acid, lauric acid, isotridecanoicacid, myristic acid, palmitic acid, palmoleic acid, stearic acid,isostearic acid, oleic acid, elaidic acid, petroselinic acid, linoleicacid, linolenic acid, elaeostearic acid, arachidic acid, gadoleic acid,behenic acid and erucic acid, as well as industrial mixtures thereof.Oleic acid monoglycerides are preferably used.

The quantity of the natural and synthetic cosmetic oily substances usedin the agents according to the present invention is usually equal to 0.1to 30 wt % based on the total application preparation, preferably 0.1 to20 wt %, and in particular 0.1 to 15 wt %.

Although each of the aforesaid care-providing substances already yieldsa satisfactory result of itself, all embodiments in which the agentcontains multiple care-providing substances, including from differentgroups, are also encompassed within the scope of the present invention.

The addition of a UV filter allows both the compositions themselves, andthe treated fibers, to be protected from damaging influences of UVradiation. At least one UV filter is therefore preferably added to theagent. The suitable UV filters are not subject to any generalrestrictions in terms of their structure and their physical properties.Instead, all UV filters usable in the cosmetics sector, whose absorptionmaximum lies in the UVA (315 to 400 nanometers (nm)) UVB (280 to 315nm), or UVC (<280 nm) regions, are suitable. UV filters having anabsorption maximum in the UVB region, in particular in the region fromapproximately 280 to approximately 300 nm, are particularly preferred.The UV filters preferred according to the present invention can beselected, for example, from substituted benzophenones, p-aminobenzoicacid esters, diphenylacrylic acid esters, cinnamic acid esters,salicylic acid esters, benzimidazoles, and o-aminobenzoic acid esters.

The UV filters are contained usually in quantities from 0.01 to 5 wt %,based on the total application preparation. Quantities from 0.1 to 2.5wt % are preferred.

In a particular embodiment, the composition according to the presentinvention furthermore contains one or more substantive dyes. This allowsthe keratinic fibers treated upon application of the agent to be notonly temporarily structured, but at the same time also dyed. This can bedesirable in particular when what is desired is only a temporarycoloration, for example with conspicuous “fashion” colors, which can beremoved again from the keratinic fibers simply by washing.

Substantive dyes are usually nitrophenylenediamines, nitroaminophenols,cationic azo dyes, nonionic azo dyes, anthraquinones, or indophenols.The compositions according to this embodiment contain the substantivedyes preferably in a quantity from 0.001 to 20 wt %, based on the totalcomposition.

It is preferred according to the present invention that the compositionsbe free of oxidation dye precursor products. Oxidation dye precursorproducts are divided into so-called developer components and couplercomponents. The developer components form the actual dyes under theinfluence of oxidizing agents or atmospheric oxygen, with one another orby coupling with one or more coupler components.

Compositions that contain water, at least one N-acylamino acid, and atleast one ionic film-forming and/or ionic setting polymer areparticularly preferably suitable for storage in said containers.

The following compositions (A) to (K) are particularly preferablysuitable for storage in said containers:

(A):

A composition encompassing at least one N-acylamino acid, at least onecationic surfactant, at least one cationic polymer, and water.

(B):

A composition encompassing at least one N-acylamino acid selected fromat least one compound of formula (I)

in which

-   -   R¹ signifies a linear or branched, saturated or unsaturated        hydrocarbon residue,    -   R² denotes a hydrogen atom, a (C₁ to C₄) alkyl group, or a (C₁        to C₄) hydroxyalkyl group,    -   R³ denotes a hydrogen atom or a

group, where n=1 or 2,

-   -   M signifies, mutually independently, a hydrogen atom or an        equivalent of a monovalent or polyvalent cation,        at least one cationic surfactant, at least one cationic polymer,        and water.

(C):

A composition encompassing at least one N-acylamino acid selected fromat least one compound of formula (I)

in which

-   -   R¹ signifies a linear or branched, saturated or unsaturated,        hydrocarbon residue,    -   R² denotes a hydrogen atom, a (C₁ to C₄) alkyl group, or a (C₁        to C₄) hydroxyalkyl group,    -   R³ denotes a hydrogen atom or a

group, where n=1 or 2,

-   -   M signifies, mutually independently, a hydrogen atom or an        equivalent of a monovalent or polyvalent cation,        at least one cationic surfactant of a monoalkyltrimethylammonium        salt of formula (Tkat1-1),

in which R1, R2, and R3 each denote a methyl group and R4 denotes asaturated, branched or unbranched alkyl residue having a chain lengthfrom 16 to 24 carbon atoms and A- signifies an anion,at least one cationic polymer, and water.

(D):

A composition encompassing water, at least one N-acylamino acid selectedfrom at least one compound of formula (I)

in which

-   -   R¹ signifies a linear or branched, saturated or unsaturated        hydrocarbon residue,    -   R² denotes a hydrogen atom, a (C₁ to C₄) alkyl group, or a (C₁        to C₄) hydroxyalkyl group,

-   -   R³ denotes a hydrogen atom or a group, where n=1 or 2,    -   M signifies, mutually independently, a hydrogen atom or an        equivalent of a monovalent or polyvalent cation,        at least one cationic surfactant of a monoalkyltrimethylammonium        salt of formula (Tkat1-1),

in which R1, R2, and R3 each denote a methyl group and R4 denotes asaturated, branched or unbranched alkyl residue having a chain lengthfrom 16 to 24 carbon atoms and A- signifies an anion,at least one cationic polymer selected from among cationic quaternizedcellulose derivatives.

(E):

A composition encompassing water, at least one N-acylamino acid selectedfrom at least one compound of formula (I)

in which

-   -   R¹ signifies a linear or branched, saturated or unsaturated        hydrocarbon residue,    -   R² denotes a hydrogen atom, a (C₁ to C₄) alkyl group, or a (C₁        to C₄) hydroxyalkyl group,

-   -   R³ denotes a hydrogen atom or a group, where n=1 or 2,    -   M signifies, mutually independently, a hydrogen atom or an        equivalent of a monovalent or polyvalent cation,        at least one cationic surfactant of a monoalkyltrimethylammonium        salt of formula (Tkat1-1),

in which R1, R2, and R3 each denote a methyl group and R4 denotes asaturated, branched or unbranched alkyl residue having a chain lengthfrom 16 to 24 carbon atoms and A- signifies an anion,at least one cationic polymer that encompasses at least one structuralunit of formula (I) and at least one structural unit of formula (2) andoptionally at least one structural unit of formula (3)

in whichR¹ and R⁴ denote, mutually independently, a hydrogen atom or a methylgroup,A¹ and A² denote, mutually independently, an ethane-1,2-diyl,propane-1,3-diyl, or butane-1,4-diyl group,R², R³, R⁵, and R⁶ denote, mutually independently, a (C₁ to C₄) alkylgroup,R⁷ denotes a (C₈ to C₃₀) alkyl group.

(F):

A composition encompassing 0.0001 to 5.0 wt % of at least oneN-acylamino acid, from 0.1 to 7.5 wt % of at least one cationicsurfactant, from 0.1 wt % to 20.0 wt % of at least one cationic polymer,and water.

(G):

A composition encompassing water, 0.0001 to 5.0 wt % of at least oneN-acylamino acid selected from at least one compound of formula (I)

in which

-   -   R¹ signifies a linear or branched, saturated or unsaturated        hydrocarbon residue,    -   R² denotes a hydrogen atom, a (C₁ to C₄) alkyl group, or a (C₁        to C₄) hydroxyalkyl group,    -   R³ denotes a hydrogen atom or a

group, where n=1 or 2,

-   -   M signifies, mutually independently, a hydrogen atom or an        equivalent of a monovalent or polyvalent cation,        0.1 to 7.5 wt % of at least one cationic surfactant, and        0.1 wt % to 20.0 wt % of at least one cationic polymer.

(H):

A composition encompassing water, 0.0001 to 5.0 wt % of at least oneN-acylamino acid selected from at least one compound of formula (I)

in which

-   -   R¹ signifies a linear or branched, saturated or unsaturated        hydrocarbon residue,    -   R² denotes a hydrogen atom, a (C₁ to C₄) alkyl group, or a (C₁        to C₄) hydroxyalkyl group,    -   R³ denotes a hydrogen atom or a

group, where n=1 or 2,

-   -   M signifies, mutually independently, a hydrogen atom or an        equivalent of a monovalent or polyvalent cation,        0.1 to 7.5 wt % of at least one cationic surfactant of a        monoalkyltrimethylammonium salt of formula (Tkat1-1),

-   -   in which R1, R2, and R3 each denote a methyl group and R4        denotes a saturated, branched or unbranched alkyl residue having        a chain length from 12 to 24 carbon atoms and A- signifies an        anion, and        0.1 wt % to 20.0 wt % of at least one cationic polymer.

(J):

A composition encompassing water, 0.0001 to 5.0 wt % of at least oneN-acylamino acid selected from at least one compound of formula (I)

in which

-   -   R¹ signifies a linear or branched, saturated or unsaturated        hydrocarbon residue,    -   R² denotes a hydrogen atom, a (C₁ to C₄) alkyl group, or a (C₁        to C₄) hydroxyalkyl group,    -   R³ denotes a hydrogen atom or a

group, where n=1 or 2,

-   -   M signifies, mutually independently, a hydrogen atom or an        equivalent of a monovalent or polyvalent cation,        0.1 to 7.5 wt % of at least one cationic surfactant of a        monoalkyltrimethylammonium salt of formula (Tkat 1-1),

-   -   in which R1, R2, and R3 each denote a methyl group and R4        denotes a saturated, branched or unbranched alkyl residue having        a chain length from 12 to 24 carbon atoms and A- signifies an        anion, and        0.1 wt % to 20.0 wt % of at least one cationic polymer selected        from among cationic quaternized cellulose derivatives.

(K):

A composition encompassing water, 0.0001 to 5.0 wt % of at least oneN-acylamino acid selected from at least one compound of formula (I)

in which

-   -   R¹ signifies a linear or branched, saturated or unsaturated        hydrocarbon residue,    -   R² denotes a hydrogen atom, a (C₁ to C₄) alkyl group, or a (C₁        to C₄) hydroxyalkyl group,    -   R³ denotes a hydrogen atom or a

group, where n=1 or 2,

-   -   M signifies, mutually independently, a hydrogen atom or an        equivalent of a monovalent or polyvalent cation,        0.1 to 7.5 wt % of at least one cationic surfactant of a        monoalkyltrimethylammonium salt of formula (Tkat1-1),

in which R1, R2, and R3 each denote a methyl group and R4 denotes asaturated, branched or unbranched alkyl residue having a chain lengthfrom 12 to 24 carbon atoms and A- signifies an anion, and

0.1 wt % to 20.0 wt % of at least one cationic polymer that encompassesat least one structural unit of formula (I) and at least one structuralunit of formula (2) and optionally at least one structural unit offormula (3)

in whichR¹ and R⁴ denote, mutually independently, a hydrogen atom or a methylgroup,A¹ and A² denote, mutually independently, an ethane-1,2-diyl,propane-1,3-diyl, or butane-1,4-diyl group,R², R³, R⁵, and R⁶ denote, mutually independently, a (C₁ to C₄) alkylgroup,R⁷ denotes a (C₈ to C₃₀) alkyl group.

Compositions (A) to (K) contain preferably at least 20 wt % water,particularly preferably at least 40 wt % water, based in each case onthe weight of the composition.

Compositions (A) to (K) have a pH preferably from 2 to 11, particularlypreferably between 2 and 7, very particularly preferably between 4 and6.

Compositions (A) to (K) are preferably liquid at least at a temperaturefrom 10 to 40° C. at 1013 mbar.

Compositions (A) to (K) preferably additionally contain at least onepropellant.

All the above-recited preferred parameters of the composition (seeabove) are furthermore valid as preferred for compositions (A) to (K),mutatis mutandis, for the features recited therein.

It is preferred according to the present invention if the containeraccording to the present invention completely encloses a cavity, thesaid composition being present in said cavity.

The containers preferably encompasses as a metallic part at least onewall made of metal at least partly enclosing the said cavity. Aluminumis particularly suitable as a metal.

It is preferred in turn to coat metallic parts of the container with apaint. This in turn applies preferably to the surface facing toward saidcavity (i.e. the interior side) of the walls made of metal. Wet paintsand powder paints are suitable as paints.

In the context of a particularly preferred embodiment, a powder paint isused for coating. Powder paints are applied, generally in powder form oras a melt, onto the surface to be coated of the corresponding metal partof the container, and cured there (thermally, by UV radiation, or by NIRradiation). Epoxy resins, epoxy resin/polyester mixtures, polyesters,polyester/isocyanate mixtures, acrylates are particularly suitable aspowder paints usable according to the present invention.

Powder paints are based on the polymer classes of epoxy resins, epoxyresin/polyester mixtures, polyesters, polyester/isocyanate mixtures, andacrylates. The powder paints produced therefrom are respectively calledepoxy resin powder paints, epoxy resin/polyester powder paints,polyester powder paints, polyurethane powder paints, and acrylate powderpaints.

The underlying polymer classes as well as the crosslinking chemistry(polyurethane powder paints) are used for naming the types of powderpaints. Misleading designations sometimes result from this: for example,isocyanate-cured acrylates are still called acrylates, whileisocyanate-cured polyesters are referred to as polyurethanes.

Radiation-curing powder paints complete the spectrum of the aforesaidones that crosslink entirely thermally. The near-infrared-curing NIRpowder paints should in principle still be included among the thermallycuring ones, since they can also be oven-cured. The UV-curing powderpaints, however, are based on a purely radiation-curing binder, i.e.require UV radiation.

Fillers influence the final paint film principally in terms of itsmechanical properties. i.e. with regard to elasticity and impactresistance as well as chemical resistance. It is also possible, however,thereby to control leveling and gloss (and therefore decorative aspects)within broad limits. Fillers moreover influence, inter alia, the degreeof edge coverage and runoff behavior at the edges during coating, aswell as the specific gravity of the powder paint and thus its spreadingrate. Natural minerals such as barites, feldspars, and chalks servepredominantly as powder paint fillers.

Powder paints can in principle be manufactured in almost all colorshades. Both organic and inorganic pigments are suitable for coloringthem, provided they are sufficiently temperature-stable. Metallicpigments and other effect pigments can suffer from the high shearloading upon manufacture of powder paints, so they are usuallyincorporated in powder form after extrusion.

A further possible embodiment of the invention is characterized in thata powder paint coating of said parts of the container encompasses atleast one epoxy resin powder paint. Epoxy resin powder paints, or epoxypowder paints, are powder paints in which epoxy resins or epoxidizednovolacs react with various hardeners to yield a coating. The hardenersused are, depending on the application sector, amines in the broadestsense or modified cyanoguanidine, phenols such as bisphenol A or F orderivatives thereof, as well as anhydride hardeners. Epoxy resins arecombined not only with these low-molecular-weight hardeners but alsowith acid polyester resins (see below epoxy resin/polyester powderpaints).

Coatings that are produced from epoxy resin powder paints are notablefor good mechanical/technological properties.

Extremely low baking temperatures are reached with phenolic hardeners.Amines, especially the dicyandiamide derivatives, result in a highcrosslinking density of the powder paint. Anhydrides are preferablysuitable for applications in which a high glass transition temperatureof the crosslinked film is required. Anhydrides are in most cases highlyirritating, and the powder preparations manufactured from them aresubject to labeling requirements. They are therefore less preferred foruse according to the present invention.

A further possible embodiment of the invention is characterized in thata powder paint coating of said parts of the container encompasses atleast one polyester powder paint.

The classic polyester system contains triglycidyl isocyanurate (TGIC).Polyester/TGIC powder paints are baked at temperatures above 150° C.,usually at approximately 190° C. Because they have little tendency toyellow, even temperatures up to 290° C. are possible, so that optionallyonly a few seconds at object temperature are sufficient for completecrosslinking of the paint film.

Further crosslinking systems that exist are on the one hand the systemsthat crosslink on the basis of a polycondensation withhydroxylalkylamide, which are notable for low baking temperatures andsmooth leveling. A disadvantage, however, is a distinct tendency towardpinholing at higher layer thicknesses, resulting from the type ofcrosslinking (release of water). On the other hand, direct successortypes to TGIC have been in use for some time. Like TGIC-containingproducts, these crosslink by polyaddition to the polyester resin.Release products that might cause pinholes are therefore not given off.

A preferred embodiment according to the present invention ischaracterized in that the said powder paint coating encompasses at leastone hydroxylalkylamide-crosslinking polyester powder paint.

A further preferred embodiment of the combination according to thepresent invention is characterized in that the powder paint interiorcoating encompasses at least one polyurethane powder paint.

PU powder paints are powder paints in which polyesters carrying hydroxygroups are cured with isocyanates. In principle, however, any otherpolymer carrying hydroxy groups is also suitable as a binder. Theisocyanates are usually capped (blocked) so that on the one hand aneasily handled solid material can be used, and on the other hand toprevent a premature reaction between the binder and hardener in thepowder paint. The capping agents furthermore ensure safe handling of thepolyurethane powder paint, since they contain no free isocyanates. Thecapping agents (usually caprolactam) are released upon baking only attemperatures above 175° C., so that object temperatures of at least 180°C. are necessary for crosslinking polyurethane powder paint. Because thereleased capping agents account for approximately 5% of the quantity ofpowder paint used, attention must be paid to effective exhaustpurification when using such powder paints.

Polyurethane powder paints yield weathering-resistant andchalking-resistant paint finishes that are preferably used for outdoorapplications (building exterior elements, automotive components).

A further possible embodiment of the invention is characterized in thata powder paint coating of said parts of the container encompasses atleast one acrylate powder paint.

Acrylate powder paints are all powder paints having an acrylate resincomponent in the binder; the crosslinking chemistry does not affect thenomenclature. In principle, with the acrylate powder paints as well allreactions that are capable of producing a network are conceivable asreactions, namely epoxy/hydroxy, epoxy/carboxy, and hydroxyl/isocyanatereactions.

Because of the chemical environment in acrylate resins, bakingtemperatures of 130° C. are sufficient for the epoxy/carboxy mechanism(unlike for the epoxy resin/polyester powder paints). In the interest ofbetter powder storage stability and greater working speed, however,baking usually occurs at 160 to 190° C. The isocyanate-crosslinkingacrylate powder paints, like the polyester-based polyurethane powderpaints, require an object temperature of 180° C.

The orange-peel structure typical of powder paints is reduced to aminimum. Acrylate powder paints are appropriate in particular forcoating aluminum parts or as a cover coat in the context of amulti-layer paint finish.

A further possible embodiment of the invention is characterized in thata powder paint coating of said parts of the container encompasses ahybrid powder paint made up of epoxy resins and polyester resinscrosslinked with one another.

In hybrid powder paints, epoxy resins and polyester resins arecrosslinked with one another.

The present invention is effective in particular for making availableaerosol products encompassing at least one aerosol container thatencloses a cavity with at least one metallic wall, where a compositionencompassing at least one N-acylamino acid, at least one propellant, andwater is arranged in the cavity.

Particularly preferably, the compositions contained according to thepresent invention in the said aerosol container are packaged as anaerosol foam or aerosol spray (particularly preferably as an aerosolfoam).

For purposes of the invention, an “aerosol container” is understood bydefinition as a container whose internal pressure is higher than theexternal pressure of its surroundings. The agents packaged in an aerosolcontainer can be, for example, sprayed or foamed. A “nonaerosolcontainer” is defined, conversely to the aerosol definition, as areceptacle whose internal pressure is the same as the external pressureof its surroundings. The agents packaged in a nonaerosol container canbe poured out or can be discharged by mechanical action by means of asqueeze system or pump system.

Propellants suitable according to the present invention are selected,for example, from N₂O, N₂, dimethyl ether, CO₂, air, alkanes having 3 to5 carbon atoms such as propane, n-butane, isobutane, n-pentane, andisopentane, and mixtures thereof. Dimethyl ether, propane, n-butane,isobutane, and mixtures thereof are preferred.

In accordance with a preferred embodiment, the aforesaid alkanes,mixtures of the aforesaid alkanes, or mixtures of the aforesaid alkaneswith dimethyl ether are used as the only propellant. The invention alsoexpressly encompasses, however, the concurrent use of propellants of thefluorochlorocarbon type, but in particular the fluorocarbons.

For a given spray apparatus, the sizes of the aerosol droplets or foambubbles, and the respective size distribution, can be adjusted by way ofthe quantitative ratio of propellant to the other constituents of thepreparations.

The quantity of propellant used varies as a function of the specificcomposition of the agent, the packaging used, and the desired type ofproduct (e.g. hair spray or hair foam). When conventional sprayapparatuses are used, aerosol foam products contain the propellantpreferably in quantities from 1 to 35 wt % based on the total product.Quantities from 2 to 30 wt %, in particular from 3 to 15 wt %, areparticularly preferred. Aerosol sprays generally contain largerquantities of propellant. In this case the propellant is used preferablyin a quantity from 20 to 98 wt % based on the total product. Quantitiesfrom 30 to 95 wt %, in particular from 30 to 65 wt %, are particularlypreferred.

The aerosol products can be manufactured in usual fashion. As a rule allthe constituents of the said composition, with the exception of thepropellant, are introduced into a suitable pressure-tight container. Thelatter is then sealed with a valve. Lastly, the desired quantity ofpropellant is introduced using conventional techniques.

Particularly preferred embodiments of the present invention are theaerosol products (AA) to (CC):

(AA):

An aerosol product encompassing a container that encloses a cavity withat least one metallic wall, where a composition that encompasses atleast one N-acylamino acid, at least one propellant, and water isarranged in the cavity.

(BB):

An aerosol product encompassing a container that encloses a cavity withat least one metallic wall coated with a paint, where a composition thatencompasses at least one N-acylamino acid, at least one propellant, andwater is arranged in the cavity.

(CC):

An aerosol product encompassing a container that encloses a cavity withat least one metallic wall coated with a powder paint, where acomposition that encompasses at least one N-acylamino acid, at least onepropellant, and water is arranged in the cavity.

It is preferred in turn if aerosol products (AA) to (CC) encompass asthe composition present in the cavity the compositions characterizedpreviously as preferred. In particular, the compositions of aerosolproducts (AA) to (CC) preferably encompass, besides the propellant, theparameters defined in compositions (A) to (K). The compositions of theembodiment of the third subject of the invention (see below) arefurthermore suitable to a preferred extent.

The compositions according to the present invention, or the aerosolproducts that contain these agents, in particular aerosol hair foams oraerosol hair sprays, are notable in particular, in addition to theoutstanding corrosion stability of the metallic container, for the factthat they impart a very strong, permanent hairstyle hold to treated haireven though the hair remains flexible. If the agent is packaged as ahair foam, it forms a stable, fine-pore, creamy foam that can bedistributed onto the hair uniformly and without dripping.

A third subject of the invention is directed toward a preferredembodiment of the invention. This embodiment relates to preferredcompositions whose corrosion effect is limited or prevented bycontaining the said N-acylamino acid according to the present invention.This refers to a composition for the temporary deformation of keratinicfibers, in particular human hair, encompassing

-   -   (i) water,    -   (ii) at least one N-acylamino acid,    -   (iii) as a polyelectrolyte, at least one ionic film-forming        and/or ionic setting polymer    -   (in particular at least one cationic film-forming and/or        cationic setting polymer),    -   (iv) at least one propellant.

“Keratinic fibers” are understood in principle as all animal hairs, e.g.wool, horsehair, angora hair, furs, feathers, and products or textilesproduced therefrom. The keratinic fibers are, however, preferably humanhairs.

Preferred ionic film-forming and/or ionic setting polymers are selectedfrom among cationic, anionic, or amphoteric polymers as well as mixturesthereof. Cationic film-forming and/or cationic setting polymers areparticularly preferred according to the present invention. The cationicfilm-forming and/or cationic setting polymers are in turn preferablyselected from at least one film-forming and/or setting polymer of thecationic polymers of the second subject of the invention.

The preferred embodiments/preferred parameters of the composition or ofthe components of the composition recited in the context of the firstand second subject of the invention continue to be valid as preferred,mutatis mutandis, in the context of the third subject of the invention.

EXAMPLES

Compositions V1 (comparison composition) and E1 (composition accordingto the present invention) of Table 1 were prepared using standardmanufacturing methods. Unless otherwise characterized, all quantityindications are percentages by weight. The following commercial productswere used as raw materials:

-   Celquat® L 200 quaternized cellulose derivative (INCI name:    Polyquaternium-4) (National Starch)-   Luviskol VA 64 W copolymer of 60% N-vinylpyrrolidone and 40% vinyl    acetate having a K value from 26 to 34 (50% active substance in    water)-   Gafquat® 755 N dimethylaminoethyl methacrylate/vinylpyrrolidone    copolymer, quaternized with diethyl sulfate (approx. 19% solids in    water; INCI name: Polyquaternium-11) (ISP)

TABLE 1 Compositions V1 E1 Celquat L-200 0.19 0.19 Luviskol VA 64 W 8.108.10 Gafquat 755 N 4.00 4.00 1,2-Propanediol 3.40 3.40 Glycerol 2.002.00 PEG-8 (polyethylene glycol, 400 g/mol) 1.50 1.50 Ethanol 18.4018.40 D-panthenol 0.20 0.20 Benzophenone-4 0.10 0.10Cetyltrimethylammonium chloride 0.30 0.30 Sodium Lauroyl Sarcosinate —0.03 PEG-40 Hydrogenated Castor Oil 0.40 0.40 Perfume 0.10 0.10 Lacticacid to pH 5 to pH 5 Propane/butane 8.00 8.00 Water to 100 to 100

The propellant-free compositions (i.e. without the propane/butanecomponent) were placed into aerosol cans made of aluminum (Aerocan co.)having powder paint-coated interior walls (powder paint: Metlac 81200)and sealed with a poppet valve by crimping. The sealed containers werethen impinged upon with the propane/butane propellant. The resultingaerosol products were stored for a period of 3 months. Once the storagetime had elapsed, the aerosol cans were emptied and cut up forevaluation of corrosion phenomena. The powder-paint coating ofcomposition E1 according to the present invention exhibited almost nobubbles caused by corrosion, while the powder-paint coating of theaerosol product of the comparison composition V1 showed considerablecorrosion phenomena and considerable bubbling of the paint layer.

While at least one exemplary embodiment has been presented in theforegoing detailed description of the invention, it should beappreciated that a vast number of variations exist. It should also beappreciated that the exemplary embodiment or exemplary embodiments areonly examples, and are not intended to limit the scope, applicability,or configuration of the invention in any way. Rather, the foregoingdetailed description will provide those skilled in the art with aconvenient road map for implementing an exemplary embodiment of theinvention, it being understood that various changes may be made in thefunction and arrangement of elements described in an exemplaryembodiment without departing from the scope of the invention as setforth in the appended claims and their legal equivalents.

What is claimed is:
 1. A method of protecting metal from corrosioncomprising: using at least one N-acylamino acid or salts thereof toprotect the metal.
 2. The method of claim 1, wherein the N-acylaminoacid is selected from at least one compound of formula (I)

in which R¹ signifies a linear or branched, saturated or unsaturatedhydrocarbon residue, R² denotes a hydrogen atom, a (C₁ to C₄) alkylgroup, or a (C₂ to C₄) hydroxyalkyl group, R³ denotes a hydrogen atom ora

group, where n=1 or 2, M signifies, mutually independently, a hydrogenatom or an equivalent of a monovalent or polyvalent cation.
 3. A productcomprises: a product encompassing a container that at least in portionssurrounds a cavity, wherein the container comprises at least onemetallic part and wherein a composition that encompasses at least oneN-acylamino acid and water is arranged in the cavity.
 4. The product ofclaim 3, wherein the composition contains the N-acylamino acidpreferably in a quantity from 0.0001 to 5.0 wt %, particularlypreferably from 0.005 to 2.0 wt %, very particularly preferably from0.005 to 1.0 wt %, based in each case on the weight of the composition.5. The product of claim 3, wherein the composition is liquid at atemperature from 10 to 40° C. at 1013 mbar.
 6. The product of claim 3,wherein the composition additionally contains at least one cationicsurfactant.
 7. The product of claim 3, wherein the compositionadditionally contains at least one cationic polymer.
 8. The product ofclaim 3, wherein the container is an aerosol container, and thecomposition additionally contains at least one propellant.
 9. Theproduct of claim 3, wherein metallic parts of the container have beencoated with a paint.
 10. The product of claim 9, wherein the paint is apowder paint.